关键词: SAR图像, 现代谱估计, 主溜线

Abstract: The extraction of Yellow River mainstream line can provide a reliable scientific basis for the design of anti-flood，disaster prevention and management，and decision-making.It is also of great significance for the Yellow River on the ecological environment，governance and the stability of the embankment.Taking advantage of SAR all-weather，all-day imaging，according to the mainstream area and the non-mainstream area differences in physical characteristics of waves，a method is proposed which is extracted Yellow River mainstream line by using modern spectral estimation technology.The SAR data experiments show that the algorithm is effective.

Key words: Synthetic Aperture Radar（SAR） image, modern spectral estimation, mainstream line